Answer:
We know that:
She bought 3 pounds of ham, at $2.45 the pound.
one gallon of milk for $2.59
4 cans of soup for $0.79 each.
A) A equation to describe this situation can be:
3*$2.45 + 1*$2.59 + 4*$0.79
This equation adds all the money that she spend in the whole purchase.
B) now we can solve the above equation and get:
3*$2.45 + 1*$2.59 + 4*$0.79 = $13.10
She spend $13.10 at the grocery store.